interactive_branch_delete.sh

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

green='\033[0;32m'
NC='\033[0m' # No Color

branches=()
eval "$(git for-each-ref --shell --format='branches+=(%(refname))' refs/heads/)"

for branch in "${branches[@]}"; do
    branch="$(echo $branch | cut -d/ -f3-)"
    echo -e "Branch to delete:     $green$branch$NC"

    read -p "Delete? (y/N)" -n 1
    if [[ $REPLY == "y" ]]; then
        echo
        echo "...................deleting"
        git branch -d $branch
    else
        echo "skipping"
    fi

    echo
done

echo 'All done!'